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BMW N54 135I/335I Catted Downpipes

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ar design BMW 135i/335i 3" Hi-Flo Catted Downpipes

We are extremely excited to present our 135i / 335i 3" Hi-Flow downpipes.  The only TRUE 3" catted downpipes currently on the market! These downpipes add significant power and virtually eliminate turbo lag, making the fabled N54 engine even more responsive!  These products are each hand fabricated right here in Denver CO.


This product is intended for off-highway application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations relating to emission requirements and motor vehicle safety standards.